Magnetic talking, dictating, and like machine



7 G. SCHEEL MAGNETIC TALKING, DICTATING, AND LIKE MACHINE Filed Dec. 4, 1922 2 Sheets-Sheet 1 8 G. SCHEEL MAGNETIC TALKING, DICTATING, AND LIKE MACHINE I Filed Dec. 4, 1922 snets-sneet 2 lnvenior ZL Q/ 4 Q v 6 v 6 H| 1\ 0 1 flak 2 g 1 v 0 dm 49M v Patented Aug. 16, 1927.

UNITED STATES 1,639,060 PATENT OFFICE.

GUSTAV SOHEEL, O1 BERLIH, GERMANY, ASSIGNOR T TELEGRAPHIEE-GESELLSCHAIT MIT BESQHBENKTEB HAITUNG SYSTEM STILLE, OF BERLIN, GERMANY.

MAGNETIC TALKmG, DICTATING, AN D LIKE MACHINE.

A neaaen iiea December 4, 1e22, serial no.

This invention relates to magnetic talking, dictating and like machines of the kind in which, according to the Poulsen system,

7 the record is taken by a steel wire that is run between two sets of opposing electromagnets. L The object of the invention 18 so to construct and arran e the magnet holders that they can easily geseparated from one another and fromthe machine frame, thereby facilitating, on the one hand the mtrodiiction-of the steel wire and on the'other'hand the renewal of worn-out magnet cores.

This object is achieved according to the invention by the rovision of a carrier connected to the mac e frame and adapted to receive the magnet holders, the latter being detachabl connected to the carrier so that they can easily be removed. Only one of 20 the holders is directly connected to the carrier, the other bein secured in position by means of locking e ements which are connected to the carrier and which can readily be unfastened for releasing the holder and for admitting the wire. Current is supplied to the magnets through contact springs which make the contact automatically when the holders are placed in the carrier. The magnet cores are held in position by cover plates whose fastening elements can also be readily turned open for releasing the plates when a renewal of the cores is required.

Fig. 1 of the drawings represents a side view of the device constructed according to the invention.

Fig. 2 is a plan of the same,

Fig. 3, a lon itudinal section showing one cover plate and the magnet cores detached,

Fig. 4, an end view of the separated magnet holders,

Fig. 5, a plan of the holders with removed cover plate, 1

gig. 6, a side view of the carrier alone,- an

Fig. 7 is a diagram of the electric connections.

With reference to Fig. 3 it will be seen that the device is composed of two superposed magnet holders 1 and 2 whose relative osition is determined by two studs 13 which are fixed to one holder and which engage apertures 20 in the other holder b means of split projecting heads. Eac holder contains a ma et composed of elec-' tric coils 3 and 4 an cores 5 and 6. Each 604,870, and in Germany December 10,1921.

pair of cores is connected to a yoke 7 by means of which the cores can easily be applied and removed.- When in use, the cores are held in position by a blade spring 12 which presses the yoke 7 against the magnet 60 s ools. The spring 12. is connected to a p ate 9 which covers the magnet coils and? which is locked in position by a bar 10. The latter turns about the stem of a knob 22 whereby the cover plate is handled, an locks the plate by engagement with headed screws 11 secured to the magnet holder. The screws 11 project beyond the surface of the cover plate which is forined with notches for their admission. 1 The record wire 8 passes between the two magnet holders which, together with the heads of the screws 13, are grooved to form a passage for the same. The magnet cores project into the wire passage and are slit to admit the wire, the magnets being arranged in a staggered position so that both pairs of cores can enter the wire passage. The magnet holders-are connectedto a carrier which may have the form of 'a frame 15 and which is secured to a support 23 on the machine frame. The frame 15 embraces the lower magnet holder 2 which is secured thereto by means of screws 16 passing transversely through the elements. For fastening the upper magnet holder 1, there are two arms 18 pivoted to the side members of the frame so that they can be turned, like hasps, into engagement with headed screws 19 connected to the holder 1.

When a fresh wire is to be introduced into the device, the arms "18 are simply turned out of enga ement with the screws 19 so that the 1101 er 1 can be lifted ofi. This, as well as the refastening of the holder after the introduction of \the wire, is an easy operation. When the-cores are worn by ti e friction with the wires and therefore require renewal, it is only neces sary to turn the bars 10 about their pivots so as to release the cover plates 9, whereupon the latter can be removed and the cores taken out. In case of a renewal of the lower pair of cores it may be more convenient to remove the holders from the carrier 15, which is easily effected by a detachncent of the screws 16.

The ends of the upper magnet coils are connected to plug terminals 14 (Fig. i), 1.

'. and corresponding socket terminals,'.which machine of the character receive the plugs when the holders are assembled, are electrically connected with contact springs 17, two direct and'two through the lower magnets. The sprlngs 17 are fitted at one end of the holder 2 so asto engage contact pieces 24. on the support 23 for collecting current from the same, when the holder is placed in the carrier 15. 1th the holder 2 in its proper position in the carrier, the tension of the springs 17 is enough to ensure a, safe electric contact.

I claim 1. In a magnetic talking, dictating or llke machine of the character described, the combination with two superposed magnet holdholder being connected to the carrier frame .so that both holders will be free for removal after the detachment of the lower one. 3. In a magnetic talking, dictating or llke 7 ,m'achine of the character described, the

combination with two superposed magnet holders and with magnet coils fitted in said holders, of magnet cores loosely arranged in said coils, detachable plates connected to the holders so as'to cover the magnets, springs connected to said plates so as to bear against the cores and hold them in position, a carrier connected to the machine, and means for securing the magnet holders to said car rier so that both can';be detached therefrom together and so that one holder can be removed without disturbing the other one, substantially as and for the purpose set forth.

4. In a magnetic talking, dictating or like machine of the character described, the combination with two superposed magnet holders and with magnet coils fitted in said holders, of magnet cores arranged loosely in said coils, plates connected'to the holders so as to cover the magnets, springs connected to the plates so as to bear against the. cores and-hold them in position, a carrier connected to the machine, means for connecting the lowerholder detachably to'said carrier,

means for clamping the upper holder to the lower one and to the carrier, so that one holder can be removed without disturbing the other and so that both can be removed together from the carrier, contact springs connected to the lower holder so asto make contact for collecting energizing current when the holder is placed in the carrier, and plug contacts connected to the upper holder for collecting current from the lower one,1 substantially as set forth.

GUSTAV SCHEEL. 

